<template>
	<view>
		<!-- 自定义组件 -->
		<!-- <my-search :bgcolor="'#000'" :radius=""></my-search> -->
		<my-search @click="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<!-- 左侧的滑动区 -->
			<scroll-view scroll-y="true" :style="{height: windowHeight+'px; width: 120px;'}" :scroll-top="scrollTop">
				<block v-for="(item,index) in cateList" :key="index">
					<view :class="['left-scroll-view-left',index==active?'active':'']" @click="activeChange(index)">
						{{item.cat_name}}
					</view>
				</block>
			</scroll-view>

			<!-- 右侧的滑动区 -->
			<scroll-view scroll-y="true" :style="{height: windowHeight+'px'}">
				<view class="cate-lv2" v-for="(item1,index1) in cateLevel2" :key="index1">
					<!-- 二级分类的标题 -->
					<view class="cate-lv2-title">
						{{item1.cat_name}}
					</view>
					<!-- 当前二级分类下的三级分类列表 -->
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item2,index2) in item1.children" :key="index2"
							@click="gotoGoodsList(item2)">
							<!-- 三级分类的图片 -->
							<image :src="item2.cat_icon" mode=""></image>
							<!-- 三级分类的标题 -->
							<text>{{item2.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import bage from '@/mixins/tabbar-bage.js'
	export default {
		data() {
			return {
				windowHeight: 0,
				cateList: [],
				active: 0,
				// 二级分类数据
				cateLevel2: [],
				scrollTop: 0
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			this.windowHeight = sysInfo.windowHeight - 50
			this.getCateList()
		},
		methods: {
			// 获取分类列表的数据
			async getCateList() {
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/categories')
				if (res.meta.status !== 200) return uni.$showMsg()
				this.cateList = res.message
				this.cateLevel2 = res.message[0].children
			},
			// 切换的点击事件
			activeChange(index) {
				this.active = index
				this.cateLevel2 = this.cateList[this.active].children
				this.scrollTop = this.scrollTop === 0 ? 1 : 0
			},
			// 点击三级分类的跳转
			gotoGoodsList(item) {
				uni.navigateTo({
					url: '/subpkg/goods_list/goods_list?cid=' + item.cat_id
				})
			},
			gotoSearch() {
				uni.navigateTo({
					url: '/subpkg/search/search'
				})
			}
		},
		mixins: [bage]
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;
	}

	.left-scroll-view-left {
		background-color: #f7f7f7;
		line-height: 60px;
		text-align: center;
		font-size: 12px;
		position: relative;

		&.active {
			background-color: #ffffff;

			&::before {
				content: ' ';
				display: block;
				width: 3px;
				height: 30px;
				background-color: #c00000;
				position: absolute;
				top: 50%;
				left: 0;
				transform: translateY(-50%);
			}
		}
	}

	.cate-lv2-title {
		font-size: 12px;
		font-weight: bold;
		padding: 15px 0;
		text-align: center;
	}

	.cate-lv3-list {
		display: flex;
		flex-wrap: wrap;


		.cate-lv3-item {
			width: 33.33%;
			display: flex;
			flex-direction: column;
			align-items: center;
			justify-content: center;
			margin-bottom: 10px;

			image {
				height: 60px;
				width: 60px;
			}

			text {
				font-size: 12px;
			}
		}
	}
</style>
